And barclay m



(No Model.)

H. BRINTON & B. M. DENNEY.

GIRGULAR KNITTING MACHINE.

Patented Apr. 29, 1890.

WITNESSES I r7 15 JW UNITED STATES PATENT OFFICE.

HENRY BRINTON, OF PHILADELPHIA, PENNSYLVANIA, AND BARCLAY M. DENNEY, OF CAMDEN, NEW JERSEY.

CIRCULAR-KNITTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 426,760, dated April 29, 1890. I

Application filed December 17, 1888. Serial No. 294,025- (No model.)

To all whom it may concern:

Be it known that we, HENRY BRINTON, of the city and county of Philadelphia, and State of Pennsylvania, and BARCLAY M. DENNEY, of the city and county of Camden, and State of New Jersey, both citizens of the United States, have invented certain new and useful Improvements in Oircular-Knittin g Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, of which Figurel is a vertical section of a knittingmachine cam-cylinder embodying our invention. Fig. 2 is a like section through the yarn-guide and adjacent sides of the cam and needle cylinders, showing a needle in place. Figs. 3 and 4 are views, respectively, of the guard and switch cams detached. Fig. 5 is a horizontal section through a part of the camcylinder, showing the jump-check and adjuncts. I

This invention relates to the well-known class of circular-knitting machines of which the Branson is a type.

Our object, more particularly, is to improve the construction of the needle-actuating cam-.

cylinder in such manner that certain defects in the operation of this class of machines will be obviated and better results attained thereby, as hereinafter explained.

To this end our invention consists in a novel construction of the guardcam and of the check-jump, as will duly appear.

Referring to the annexed drawings, A represents the rotatable cam-cylinderof a knitting-machine, said cylinder containing the stitch-cams a, the switch-cams or tumblers cf, the upper cam a and the lower earn a. Pivoted at m to each end of the cam a isatriangular guard-cam B, WllOSB' free end or nose I) is slightly above the plane of the pivotal point 00, so that it (said nose) will drop by gravity, and thus normally assume its down or active position. The function of this cam B is as follows: As the cam-cylinder rotates, if the heel of a needle happen, by accident or otherwise, to be above the mouth of the cam-groove a a, it (said heel) will impinge against the nose of cam B, and the latter, yielding or rising, will guide the heel of the needle into the damaging the same or the needle-cylinder, or

both. Should the heel of the needle be above the nose of cam B, the inclined upper face of the latter will deflect the needle above the end of and upon the cam a without in any Wise damaging the needle or the machine, a misstitch upon the article being knit merely resulting.

On the nose of the cam B we mount a small roller b which renders the cam more effective in operation, obviating the otherwisevattendant liability of the'joint in the needleheel being caught on and jammed against the nose of the cam. This roller we consider a needed and valuable addition to either pivotal or sliding guard-cams, and we therefore do not restrict ourselves to its use in connection with a guardcam specifically constructed as herein shownand described.

The upward and downward movements of cam B are limited by its corners impinging against the ends or edges of the offset in which the cam is pivoted.

Another feature of our invention relates to a device for preventing the needles from being thrown above the needle-rest a from the lower cam a upon the completion of the stitch. This device consists merely of a piece of spring-wire O, screwed or otherwise secured at one of its ends to the exterior of the camcylinder A at a point 0 near one end of a horizontal slot or opening 0 in the side of said cylinder just above the summit of the elevating-incline a of cam a and bent so as to project into and beyond the slot, the free' end of the wire extending outward, so as to bear against the opposite end of said slot, and thereby limit the inward movement of the spring. As the needles are forced up by this incline, their heels strike the projecting portion of the wire, and the needles are thereby checked in their upward movement. The wire, being elastic, will readily yield if it shall happen to strike the heel of a raised needle during the revolution of the cam-cylinder in the reverse direction while knitting the heel or toe of a stocking, the. A similar check de vice operating in the same manner is thus disposed with reference to each side of the cam a (t represents the vibrating switch-cam or tn mbler,which an tomatically closes the mouth of the cam-groove on the escape of the needles therefrom upon the completion of the stitch, in order to prevent the needles from passing back again into the cam-groove when the movement of the cam-cylinderis reversed. This tumbler has a rear projection a, whose function is to limit the upward movement of the tumbler by impinging against the side of the stitch-cam a, so as to obviate all danger of the tumbler being thrown or raised so high as to be unable to return to its closing position.

The tumbler on each side of cam a is identical in construction and operation with the tumbler j nst described. The yarn-guide is made vertically and horizontally adjustable in the following manner, in order that it may be adapted to needles y, Fig. 2, of various sizes, or for other purposes, as occasion may require:

D represents the yarn-guide, which is secured to the supporting-post d by means of v a screw (1 that passes through a slot (Z in the horizontal arm of the guide, thus rendering the latter adjustable horizontally. This post cl is provided with a central longitudinal groove or channel (1 on its inner side, into which projects a vertical rib a on the side of the cam-cylinder, as seen more clearly in Fig. 2, thus preventing lateral displacement of said post. The latter is held in place vertically by means of screws (1 which pass through slots (1 in said post, thus rendering the same readily adjustable vertically.

The construction of the yarn-guide just described is not claimed in this application; but forms the subject of a divisional application, filed October 17,1889,Seria1No. 327,302.

Having thus described our invention, we

claim as new and wish to secure by Letters Patent- 1. In a knitting-machine of the class rccited, the combination, with the cam-cylinder, of the guard-cam pivoted at or near one of its corners to the end of the upper cam, so that the forward corner or nose of said guard-cam will drop by gravity to the normal or active position, substantially as described.

2. In a knitting-machine of the class rccited, the combination, with the cam-cylinder, of the guard-cam disposed at the end of the upper cam, so that the nose or forward corner of the guard-cam will be presented to the path of movement of the needles, together with the roller 011 the nose of said guard-cam, substantially as described.

8. In a knitting-machine of the class recited, the combination, with the cam-cylinder,

of the guard-cam pivoted to the end of the upper cam, so that the nose or forward corner of the gnard-camlwill be presented to the path of movement of the needles, together with the roller on the nose of said guard-cam, substantially as described.

4:. In a knitting-machine, the combination, with the cam-cylinder having a horizontal slot therein, just above the summit of the elevating-incline of the lower cam, of the jump-check consisting of a single piece of spring-wire secured at one of its ends to the exterior of said cylinder at a point near to one end of the slot therein and bent so as to project into and beyond the said slot, the free end of the wire extending outward, so as to bear against the opposite end of the slot, and thereby limit the inward movement of the spring, substantially as described.

In testimony whereof we have hereunto affixed our signatures this 4th day of December, A. D. 1888.

HENRY BRINTON. BARCLAY M. 'DENNEY. Witnesses:

JOHN NOLAN, EDWARD I. 'looLE. 

